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Compared to modern electrical wiring standards, these are the main technical shortcomings of knob-and-tube wiring methods: never included a safety grounding conductor did not confine switching to the hot conductor (the so-called Carter system prohibited as of 1923 places electrical loads across the common terminals of a three-way switch pair)
Cabinets with horn-loaded tweeters often have an attenuator knob for controlling the tweeter. Bass cabinets have thicker wood panels than electric guitar amps, and often have stronger internal bracing. This reduces the likelihood of unwanted cabinet buzzes or rattles, which are more likely with bass cabinets due to the lower sound frequencies ...
Hydraulic piston vangs are used on larger sailboats and controlled by manual or electric hydraulic pumps. [2] By controlling leech tension, the boom vang is one way of controlling sail twist. [3] The boom vang may also be used to flatten the mainsail on dinghies. [4] On small sailboats and some cruising sailboats a vang may be omitted.
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A diagram showing the wiring of a Gibson Les Paul electric guitar. Shown are the humbucker pickups with individual tone and volume controls (T and V, respectively), 3-way pickup selector switch, tone capacitors that form a passive low-pass filter, the output jack and connections between those components. The top right shows a modification that ...
Some EUBs have built-in pickups and volume controls, similar in function to the pickups and knobs on an electric bass (also called the bass guitar). Some EUBs are sold without an onboard pickup or knobs; a player using this instrument would need to purchase a piezoelectric (or magnetic) pickup separately and then attach the pickup to the body or bridge.
The bass also has a standard vintage-style top-loading bridge and tuners. An onboard preamp is controlled by bass/treble boost rollers and an on/off switch located on the top control panel. The lower control panel holds on/off switches for each of the pickups, and a switch to toggle between parallel and series wiring of the pickups.
The "quint" free-bass system invented by Willard Palmer – later patented by Titano, has extra bass rows to extend the existing bass arrangement of the Stradella system. [6] The quint version and chromatic-button versions were available in "converter" (or "transformer") models with a control to switch from standard Stradella to free-bass. [7]